Restrictive and Binge-Purge OSFED Variants: Clinical Features and Comparisons With Classical Eating Disorders

Area of Science:

• Psychiatry
• Clinical Psychology
• Eating Disorders

Background:

• The diagnostic category of other specified feeding or eating disorder (OSFED) encompasses atypical eating disorders.
• Previous research suggests OSFED shares psychological and symptomological similarities with classical eating disorders (EDs).

Purpose of the Study:

• To compare individuals with OSFED to those with classical EDs (AN-R, AN-B/P, BN) on various clinical indices.
• To examine differences between OSFED variants: restrictive (OSFED-R) versus binge-eating/purging (OSFED-B/P).

Main Methods:

• A cohort of 836 treatment-seeking adults with EDs was analyzed.
• Participants included individuals with AN-Restricting type (AN-R), AN Binge-eating/purging type (AN-B/P), Bulimia Nervosa (BN), OSFED-R, and OSFED-B/P.
• Generalized linear models were used for data analysis.

Main Results:

• OSFED diagnoses were comparable to classical EDs regarding psychological symptoms, personality traits, functional impairment, illness duration, and treatment motivation.
• OSFED-R reported higher psychological ED symptoms than AN-R.
• OSFED-B/P exhibited more ED-related psychological symptoms than OSFED-R, but did not differ from AN-B/P or BN.

Conclusions:

• OSFED syndromes present serious clinical implications comparable to full-threshold AN and BN.
• Investigating heterogeneity within OSFED, specifically the restrictive versus binge/purge distinction, is clinically relevant.